| Name | Meaning | Gender | Origin |
|---|
| Kai | Fire
| Male | Hawaiian |
| Kana | Powerful | Unisex | Japanese |
| Kane | tribute, warrior; the doubly-accomplished, golden; man, the eastern sky; beautiful | Male | Celtic |
| Kazuo | Harmonious Man | Unisex | Japanese |
| Keith | wood, wind; wood-dweller | Male | Scottish |
| Ken | Male Barbie Doll. | Male | English |
| Kenji | after Michael Kenji Shinoda, from the band Linkin Park | Male | Japanese |
| Kenshin | Sword, Heart | Unisex | Japanese |
| Kioko | Meets World With Happiness | Unisex | Japanese |
| Kita | north | Unisex | |
| Kohana | little flower | Unisex | |
| Koji | | Unisex | Hebrew |
| Kura | Treasure House | Unisex | Japanese |
| Kyo | Approval, Ginger, Or Large | Unisex | Japanese |
| Lalo | To Sing A Lullaby | Unisex | Latin |
| Lane | narrow road | Male | English |
| Lewis | Renowned fighter. Form of Louis.
| Male | English |
| Lex | Protector Of Mankind | Male | English |
| Lexie | Protector Of Mankind | Unisex | English |
| Lexus | English variation of Alexios, defending men | Male | Greek |
| Liam | Form of William.
| Male | Irish |
| Lord | A male title of nobility. | Male | English |
| Ludo | after the character in the movie Labyrinth | Unisex | |
| Luther | Renowned warrior.
| Male | |
| Madoka | | Unisex | Hebrew |